Charging bell construction



y .3 c. w. ANDREWS CHARGING BELL CONSTRUCTION -r sr1 t in' 'smoother "operatl t P f invention 'ieletes *e iin-: j proved'iblastwfurnaeezohangingloell construe tionmncl'more perticulai'lyio a construction v 1 I cof thisxoheiactei aidaptecl to more uniformly 5 distribute the material over the furnace area than bells ofltheusu'al type? Blast furnaces and j similar "furnaces are 7 ,verysgener ally-chargedJoy-means of av double lh'ell' siystem', the charge being' helfl between ifoi'mly raboutthetiucumferenee of the furi stzmtially:equal portions 0f the ieh'zirge are jintnorludedinto each portion of the periph- --ery:;0f.the.furnaee-buttheydonot effect a mtmmity of? the charge throughout the I.{1 0121093 SeClllbnalfalea of the furnace;

I yll h: usual bellsi'shoot the xoharge off of their sloping sur'f ac'ies against the sides of the furnace. vT-The; large j'lumps rare deflected Efrem:thie sides act the furnaces and rollback 1 2 towari'clthe ce iterai' directly under; the {bell,

f whifchmenterfportionnof the oh'argeiisvusually loitii The finer" material remains acent film J sides gwherewitl is delivered by the bell fillhis has the result :ofmzkingthe center; of

' 130 theetuix'iaceiniuehgmorepermeable and open for thejpassageofthelgases through the 'f u1 nztezind results in uneven burning andWOrkingot theffurnac'e 'harge:-; Theseinequ;1lities :iVOuIdEbe obviateiliii'itwere p0ssible:t0"sul {SLtantiallv' 'evenlyfidistribute the :fineiancl 4 'FigureQ is aipl'zynaview ofthe 'f elfa i I I); 1 t

hoarse mateni all f over the E zentire'yacrossf sec- :mtiOl ltLI meant the furnace charge as the gases h-wculd then passfupyevenlythroughout the g :charge and the eh-aigeKitSeIf would travel ldQWIl he fumale {more @eV, lily; T his would u of-lthe furnace d less:prod ctionzofflue dust? more ievenii disftributionais ac omilishedlby the use otehopt r ring which engages h charging bell at a; ointspztcecl from, the ,,;-pe ph r-yof theib'ell-i Tll e, bel s made to en agem nt, w the' he heppe i a dif QF FFE A DRW Y FECHIQAGQ ILnmoIS, AS IGNOR eTo 1-1. AQ AsS RT 18 coir- I e l Any yoijonIq eqfILLI Ims, noor rogmmon OFLILIQINOIS" .2

' f :of"CHARQillTG'BELLlCONSTRiTC'IIQN i gib uc'atip'ilim u unitar 29; 1928. seriaiuo; 248,149. i

, inithe ifor'ni of alspiral o'r helix. v-The!ibegiie1;-

the line of the engagement between :thev hop- {provide a new and improved Charging "hell feonstructlon adapted to substantiallyevenly 'clistribute' the charged material throughout 1 -'tion' of thisichareeter which'is-simple indevmencial; production and install'zttioniwithout ithel'deseription proceeds;

"-LFlguT Q :1" set showing y improved bell oonstnuetiou 'a'P-I ifl Referring first "to Figure '1', fthe top "of :tlie-e ablastfurnace shellisishoivli atsll fand the! e, lining at 12; The 'hopp'eilring' 13 ais'seeui'di to thee topof' the 'shellll to. which is also conneotedzthehoppei housing platesl L @111 the form showntheeeharging nhutegljis rotated ibY m a s i t e g rslfi-ancl mo or 17 eeorling to' be: present; inventionthis such forms of ,eonstru ction zirepossible 7 to carry out this ilrivention, ethe prefer'rea formeonsists i11-havingythe edgefbf the bell ning ,ofthe helix islocat'ed' closel y."adjacent i p er fing and the charging bell andthe outer I e end oflthehelix Will'be locatedradiallyout- 'wardfi om theline'o f the hopper 'ring aany v cdesiredfclistance, dependinglupon 'the lsize'iii and operation ofI-t'he' parts: The: hell-is rotated progressi vely,v during the operation of the furnaces I t It is'ean aobject ofthe present-linveutionto the cross 5 sectional area of the. furnizde; I It is an additional object tozpfovideal coni struetion of this character in which theeharg-fib vingbell-itse'lfis pfogressively notated as th e t furnace is charged." in M t v Itlis als'o arfobject to provide a eonstr ue signandioperation, :andhdap'ted for con)- materi a1 change Lin existing structures: I niOt-her and furthei-*zobjects {appearus' s I haye illustrated a preferred j'of my invention in the accompanying ings', in'whichl l l fragmentary :s'ection'elryieiw J plieclto the topof i1 blast furnace;v T2 ,7 L: i i

JFiQure 3 is' a'planvieuzanenlzirgetl seale showingthe:mtcliet bell rotating mebhanism. 7

order to g v a be r fl tributionof the m tepial throughout theeiicumfelfeheegof the f Thes h n me e li d l ered" e theem by mew f i the wettin gktpuma I '50 a t s .fIn the use ofthe-charging apparatusitwill 18srunning on tracks 19 ":It will be under:

stood that, the construction'so far descrlbed is ofa usual type with the exception that the hopper ring l3-is so designed as to meet the large charging bell upon a smaller c rcle than is customary in usual Constructions.

, Thelarge charging bell 20 is suspendedfrom the hanger rod 21 and the small charg- "ing bell 22, which cooperates with the bottomsecti'on23lofthe charging chute, is'hung z from the sleeve 24 inthe usual manner;

will be understood that usual forms of apparatus' will be provided for raising and lowering the smaller charging-bell and suchde- .vices'have not. been shown as they f partaof the present'inventi t The hanger rod 21 of the larger bell is xex'tended throughthe steam cylinder 25 and through the ratchet-sleeve 26. The ratchet sleeve 26' is rotatably-fitted upon the top of thecylinder 25. '.Tl1e "piston 27 is carried upon the rod 21 within the cylinderf25 and any usualzconnections may be provided for admitting. steam into the cylinder to force the piston upwardly and thus close the larger bell 20 against the hopperfring 13; 'Thebell is dropped by releasing thesteam pressure under the piston. The rod 21 .is provided with the arm28, as best shown in-Fi'gure 3, this arm 28 fittinglinto the spiral groove'29 formed in the ratchet sleeve 26. The sleeve 26 is provided with teeth 30 which are engaged'by the spring pressed pawl which is 7 carried on lug 32.- a

The lower edge 33 of the charging bell 20 is formed. spirally in'outline, as best shown in Figure 2.- Since the bell 20 is pivotally sup- 7 ported on the rod 21, it is highly desirable to 'haveit balanced about its pivotpoint and for rhang properly from the rod 21' so as to'uniformly. en

I gage the lower edge of; the hopper be understood that the charging material is introduced through chute15 and will pass a I down through the chute and be distributed 1 a 20by means'of the small'bell 22. Thej chute into "the'hopp-er formed above the large'bell 1:5may be rotatedto make this distribution more uniform throughout-the circumference of the hopper; ,When it is, desired to introduce a charge into the furnace the small bell 22 is raised and closes the lower end of the chute15QfThe large bell -is then lowered by releasing the pressure in the steam cylinder 25,."- As the bell separates fromtheedge of the hopper ring 13 ,"m'aterial will flow down 'rota-tion-inthisdirection.

between the ring andthe bell into the top of the furnace. This material will be guided in its fiowby the lower flange of the bell and will r be guided different distances towards the outer furnace wallat different clrcumferential points due to the difference in theradial 'eXtent of the bell. All of the material will thus not be shot directly against the lining wallsas in, usual forms ofconstruction, but

tion of the, furnace area. 7

As the bell moves downwardly the rod 21 will move downwardly, carrying downwardwill' be distributed throughout a large p01- ly the arm 28. This downwardmovement of the arm 28 will force the ratchet sleeve 26 to rotatein the clockwise direction, as'seen in Figure 3. This is for'the reason that the sleeve will rotate much more easily than the entire bell and rod=assembly. This rotation of thesleeve will be permitted by the spring pawl 31 which will ride over the teeth upon 1 'Aftertthe charge has entered'the furnace,

the bell 20 will be raisedby the introduction of steamer other fluid underpressure into cylinder 25. As therod 211 rises it will force the arm 28 upwardly in the groove 29? of'the ratchet sleeve 26-. This will tend to force the sleeve in the counterclockwise direction but such movement of'the sleeve is prev ented by the spring pressed pawl 31. The arm 28 and groove 29 will thus'serve to rotate the 'rod 21 and bell 20. In the form shown, this rotation is approximately aquarter of the circle. It will be understood that the slope of the I groove 29:may be modified-to1give any desired amount of rotation jofthe bell with each charging movement of thebell.

While I have shown one preferred form of my invention, itis capablelof further changes and modifications to meetvarying conditions ofservice andto' adaptit for use with different constructions, and lcontem'platesuch changes-"and modifications as come within the spirit and scope of the 'appended'claims;

I Claim "V :1I@ i, 1. In a blast furnace, acharging bell located interiorly of the top of the furnace,aj-h0pper ring'i'n the furnace having acircular opening, the bell having)a'xdownwardly curved upper portion having a similar con- -tour on-all diameters,"s'aid upper portion en:

gaging the circular opening in'the hopper,

an extended downwardlysloping portionjon the bell extending beyond the line of contact withthe hopper, said extended portion varying in wldthithroughout its circumference T and having a helical lower'edge, and counterbalance means on the inner faceof the extended portionwhereby the bell isbalanced-about "its central upper portion;

7 2. In a blast furnace,-fa charging bell lo;

cated interiorly of the top of the furnace, a hopper ring in the furnace having'acircul'ar opening, the bell having a downwardly curved upper portion having a similar conmeans on the inner face 'of the ex ended portion whereby the hell is balanced about its central upper portion, and means whereby the bell is rotated: progressively during its opera- 'tion. e

Signed at Chicago, Illinois, this day 15 fo'f January, 1928. r

Y CHARLE Sj W. ANDR WS. 

